A crossing-shock-wave/turbulent-boundary-layer interaction is investigated using the
k–ε turbulence model with a new low-Reynolds-number model based on the approach
of Saffman (1970) and Speziale et al. (1990). The crossing shocks are generated by
two wedge-shaped fins with wedge angles α1 and α2 attached normal to a flat
plate on which an equilibrium supersonic turbulent boundary layer has developed.
Two configurations, corresponding to the experiments of Zheltovodov et al. (1994,
1998a, b), are considered. The free-stream Mach number is 3.9, and the fin angles
are (α1, α2) = (7°, 7°) and (7°, 11°). The computed surface pressure displays very
good agreement with experiment. The computed surface skin friction lines are in
close agreement with experiment for the initial separation, and are in qualitative
agreement within the crossing shock interaction region. The computed heat transfer
is in good agreement with experiment for the (α1, α2) = (7°, 7°) configuration. For
the (α1, α2) = (7°, 11°) configuration, the heat transfer is significantly overpredicted
within the three-dimensional interaction. The adiabatic wall temperature is accurately
predicted for both configurations.